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How Instance Switch Occur [message #302802]

Wed, 27 February 2008 01:09

Oraclist
Messages: 33
Registered: January 2008
Location: Dhaka, Bangladesh

Member

A client is connected to one database instance and after some time the corresponding machine fails. How this connection is switched to another RAC instance?

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Re: How Instance Switch Occur [message #302816 is a reply to message #302802]

Wed, 27 February 2008 01:43

Michel Cadot
Messages: 68758
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

It depends on your network options (tnsnames.ora...), your progamming language (not all of them have the same possibilities), your code (how do you choose to handle that).

For an application point of view, read Oracle� Database Oracle Clusterware and Oracle Real Application Clusters Administration
Chapter 6 Introduction to Workload Management
Especially section Oracle Clients that Are Integrated with Fast Application Notification

Regards
Michel

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Re: How Instance Switch Occur [message #303075 is a reply to message #302802]

Wed, 27 February 2008 21:43

Oraclist
Messages: 33
Registered: January 2008
Location: Dhaka, Bangladesh

Member

I want to know within database instance how it is maintained.I am connected to one database instance and suddenly that pc is shut down now how my connection is passed to another alive instance.

And another question when an application requests a connection to an Oracle database server through the driver, does the driver connect to the database server directly? or the driver sends a connection request to a listener process, which forwards the request to the appropriate Oracle database instance.

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Re: How Instance Switch Occur [message #303082 is a reply to message #302802]

Wed, 27 February 2008 22:22

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

Are you unwilling or incapable of Reading The Fine Manual?

http://download.oracle.com/docs/cd/B19306_01/server.102/b14210/toc.htm

http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/toc.htm

http://download.oracle.com/docs/cd/B19306_01/server.102/b25159/toc.htm

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